Photocatalytic CO2 reduction by a Z-scheme mechanism in an aqueous suspension of particulate (CuGa)0.3Zn1.4S2, BiVO4 and a Co complex operating dual-functionally as an electron mediator and as a cocatalyst

Tomiko M. Suzuki; Shunya Yoshino; Keita Sekizawa; Yuichi Yamaguchi; Akihiko Kudo; Takeshi Morikawa

doi:10.1016/j.apcatb.2022.121600

Photocatalytic CO₂ reduction by a Z-scheme mechanism in an aqueous suspension of particulate (CuGa)_0.3Zn_1.4S₂, BiVO₄ and a Co complex operating dual-functionally as an electron mediator and as a cocatalyst

Tomiko M. Suzuki, Shunya Yoshino, Keita Sekizawa, Yuichi Yamaguchi, Akihiko Kudo, Takeshi Morikawa

応用化学科

研究成果: Article › 査読

20 被引用数 (Scopus)

抄録

A visible-light-driven Z-scheme photocatalytic CO₂ reduction reaction (CO₂RR) to produce CO was demonstrated using an aqueous particulate dispersion containing two bare semiconductors, (CuGa)_0.3Zn_1.4S₂ for CO₂RR and BiVO₄ for water oxidation. The semiconductors were mixed with a water-soluble cobalt tris(dimethylbipyridine) complex. The CO selectivity was 98% (against H₂), and the rate of CO generation was 1–2 orders of magnitude higher than those of previously-reported aqueous suspension photocatalytic systems. O₂ was continuously evolved, and isotope tracer analyses confirmed that CO₂ was the carbon source for CO. Experimental studies and calculations suggest that the Co complex acts dual-functionally in synergy with (CuGa)_0.3Zn_1.4S₂ and BiVO₄: it behaves as an efficient ionic electron mediator, and also acts as a new active CO₂RR cocatalyst after a structural change by accepting photoexcited electrons from (CuGa)_0.3Zn_1.4S₂. This simple method, operating in a self-optimizing manner in solution, has great potential to help achieve sustainable, highly active artificial photosynthetic systems.

本文言語	English
論文番号	121600
ジャーナル	Applied Catalysis B: Environmental
巻	316
DOI	https://doi.org/10.1016/j.apcatb.2022.121600
出版ステータス	Published - 5 11月 2022

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10.1016/j.apcatb.2022.121600

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引用スタイル

Suzuki, T. M., Yoshino, S., Sekizawa, K., Yamaguchi, Y., Kudo, A., & Morikawa, T. (2022). Photocatalytic CO₂ reduction by a Z-scheme mechanism in an aqueous suspension of particulate (CuGa)_0.3Zn_1.4S₂, BiVO₄ and a Co complex operating dual-functionally as an electron mediator and as a cocatalyst. Applied Catalysis B: Environmental, 316, 記事 121600. https://doi.org/10.1016/j.apcatb.2022.121600

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title = "Photocatalytic CO2 reduction by a Z-scheme mechanism in an aqueous suspension of particulate (CuGa)0.3Zn1.4S2, BiVO4 and a Co complex operating dual-functionally as an electron mediator and as a cocatalyst",

abstract = "A visible-light-driven Z-scheme photocatalytic CO2 reduction reaction (CO2RR) to produce CO was demonstrated using an aqueous particulate dispersion containing two bare semiconductors, (CuGa)0.3Zn1.4S2 for CO2RR and BiVO4 for water oxidation. The semiconductors were mixed with a water-soluble cobalt tris(dimethylbipyridine) complex. The CO selectivity was 98% (against H2), and the rate of CO generation was 1–2 orders of magnitude higher than those of previously-reported aqueous suspension photocatalytic systems. O2 was continuously evolved, and isotope tracer analyses confirmed that CO2 was the carbon source for CO. Experimental studies and calculations suggest that the Co complex acts dual-functionally in synergy with (CuGa)0.3Zn1.4S2 and BiVO4: it behaves as an efficient ionic electron mediator, and also acts as a new active CO2RR cocatalyst after a structural change by accepting photoexcited electrons from (CuGa)0.3Zn1.4S2. This simple method, operating in a self-optimizing manner in solution, has great potential to help achieve sustainable, highly active artificial photosynthetic systems.",

keywords = "CO reduction, Metal-complex, Photocatalysis, Semiconductor, Z-scheme",

author = "Suzuki, {Tomiko M.} and Shunya Yoshino and Keita Sekizawa and Yuichi Yamaguchi and Akihiko Kudo and Takeshi Morikawa",

note = "Publisher Copyright: {\textcopyright} 2022 The Authors",

year = "2022",

month = nov,

day = "5",

doi = "10.1016/j.apcatb.2022.121600",

language = "English",

volume = "316",

journal = "Applied Catalysis B: Environmental",

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Suzuki, TM, Yoshino, S, Sekizawa, K, Yamaguchi, Y , Kudo, A & Morikawa, T 2022, 'Photocatalytic CO₂ reduction by a Z-scheme mechanism in an aqueous suspension of particulate (CuGa)_0.3Zn_1.4S₂, BiVO₄ and a Co complex operating dual-functionally as an electron mediator and as a cocatalyst', Applied Catalysis B: Environmental, vol. 316, 121600. https://doi.org/10.1016/j.apcatb.2022.121600

Photocatalytic CO₂ reduction by a Z-scheme mechanism in an aqueous suspension of particulate (CuGa)_0.3Zn_1.4S₂, BiVO₄ and a Co complex operating dual-functionally as an electron mediator and as a cocatalyst. / Suzuki, Tomiko M.; Yoshino, Shunya; Sekizawa, Keita その他.
In: Applied Catalysis B: Environmental, Vol. 316, 121600, 05.11.2022.

研究成果: Article › 査読

TY - JOUR

T1 - Photocatalytic CO2 reduction by a Z-scheme mechanism in an aqueous suspension of particulate (CuGa)0.3Zn1.4S2, BiVO4 and a Co complex operating dual-functionally as an electron mediator and as a cocatalyst

AU - Suzuki, Tomiko M.

AU - Yoshino, Shunya

AU - Sekizawa, Keita

AU - Yamaguchi, Yuichi

AU - Kudo, Akihiko

AU - Morikawa, Takeshi

PY - 2022/11/5

Y1 - 2022/11/5

N2 - A visible-light-driven Z-scheme photocatalytic CO2 reduction reaction (CO2RR) to produce CO was demonstrated using an aqueous particulate dispersion containing two bare semiconductors, (CuGa)0.3Zn1.4S2 for CO2RR and BiVO4 for water oxidation. The semiconductors were mixed with a water-soluble cobalt tris(dimethylbipyridine) complex. The CO selectivity was 98% (against H2), and the rate of CO generation was 1–2 orders of magnitude higher than those of previously-reported aqueous suspension photocatalytic systems. O2 was continuously evolved, and isotope tracer analyses confirmed that CO2 was the carbon source for CO. Experimental studies and calculations suggest that the Co complex acts dual-functionally in synergy with (CuGa)0.3Zn1.4S2 and BiVO4: it behaves as an efficient ionic electron mediator, and also acts as a new active CO2RR cocatalyst after a structural change by accepting photoexcited electrons from (CuGa)0.3Zn1.4S2. This simple method, operating in a self-optimizing manner in solution, has great potential to help achieve sustainable, highly active artificial photosynthetic systems.

AB - A visible-light-driven Z-scheme photocatalytic CO2 reduction reaction (CO2RR) to produce CO was demonstrated using an aqueous particulate dispersion containing two bare semiconductors, (CuGa)0.3Zn1.4S2 for CO2RR and BiVO4 for water oxidation. The semiconductors were mixed with a water-soluble cobalt tris(dimethylbipyridine) complex. The CO selectivity was 98% (against H2), and the rate of CO generation was 1–2 orders of magnitude higher than those of previously-reported aqueous suspension photocatalytic systems. O2 was continuously evolved, and isotope tracer analyses confirmed that CO2 was the carbon source for CO. Experimental studies and calculations suggest that the Co complex acts dual-functionally in synergy with (CuGa)0.3Zn1.4S2 and BiVO4: it behaves as an efficient ionic electron mediator, and also acts as a new active CO2RR cocatalyst after a structural change by accepting photoexcited electrons from (CuGa)0.3Zn1.4S2. This simple method, operating in a self-optimizing manner in solution, has great potential to help achieve sustainable, highly active artificial photosynthetic systems.

KW - CO reduction

KW - Metal-complex

KW - Photocatalysis

KW - Semiconductor

KW - Z-scheme

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U2 - 10.1016/j.apcatb.2022.121600

DO - 10.1016/j.apcatb.2022.121600

M3 - Article

AN - SCOPUS:85132856175

SN - 0926-3373

VL - 316

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 121600

ER -